package typesys;

import ast.Principal;

public class BottomPrincipal extends Principal {
	
	private static BottomPrincipal instance = null;
	
	public static BottomPrincipal getInstance()
	{
		if (instance == null)
			instance = new BottomPrincipal();
		return instance;
	}
	
	private BottomPrincipal()
	{
		super("_");
	}

}
